Shiver, John M.
Jones & Bartlett Learning, 2016
Buku Teks
Collins, Charles
Oxford University Press, 1994
Buku Teks
Green, Andrew
Oxford University Press, 2007
Buku Teks
Prerau, David S.
Addison-Wesley, 1990
Buku Teks
Wolper, Lawrence F.
Jones & Bartlett, 2011
Buku Teks